BIO 221-Quiz 2 Introduction to Chemistry

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Ion

• Compound

Which subatomic particle has a positive charge?

• Electron

• Proton

• Neutron

• Positron

What is the chemical symbol for sodium?

• S

• Na

• So

• Sn

Which of the following best describes a covalent bond?

• Transfer of electrons

• Sharing of electrons

• Attraction between ions

• Attraction between molecules

Tags

NGSS.HS-PS1-1

What type of bond is formed when one atom donates an electron to another atom?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Metallic bond

Which of the following is a strong acid commonly found in the stomach?

• Acetic acid

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

What is the pH of a neutral solution at 25°C?

• 0

• 7

• 14

• 1

Which of the following is an example of a carbohydrate?

• Glucose

• Glycerol

• Adenine

• Cholesterol

Which element is present in all organic compounds?

• Nitrogen

• Oxygen

• Carbon

• Phosphorus

Tags

NGSS.HS-LS1-6

NGSS.HS-LS2-5

What is the main function of proteins in the human body?

• Energy storage

• Catalyzing reactions

• Genetic information storage

• Insulation

Tags

NGSS.HS-LS1-1